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Re:Volkswagen Is Ordered to Recall Nearly 500k Vehicles Over... by denzil_correa on Friday September 18, 2015 @12:56PM (#10240301)
Does HN not detect duplicates? I submitted the same article 3 minutes before OP.

https://news.ycombinator.com/item?id=10239985

There's also another submission 15 minutes after OP's submission too.

https://news.ycombinator.com/item?id=10240106

Re:Volkswagen Is Ordered to Recall Nearly 500k Vehicles Over... by metasean on Friday September 18, 2015 @01:02PM (#10240351)
It does to a point.

The OP's link after .html: ?_r=0

Your link after .html: ?module=Notification&version=BreakingNews&region=FixedTop&action=Click&contentCollection=BreakingNews&contentID=50913528&pgtype=Homepage

The 3rd link after .html: ?referrer=

In this case, while the links may lead to the same article, they are NOT the SAME link.

edited: to make url differences more visible

Re:Volkswagen Is Ordered to Recall Nearly 500k Vehicles Over... by doughj3 on Friday September 18, 2015 @01:01PM (#10240343)
Re:Volkswagen Is Ordered to Recall Nearly 500k Vehicles Over... by bigdubs on Friday September 18, 2015 @01:03PM (#10240365)
The urls are different for the one you submitted and OPs. Generally if you can remove extra query string params in the submission it helps the filter / deduper work better.
Re:Volkswagen Is Ordered to Recall Nearly 500k Vehicles Over... by chmaynard on Friday September 18, 2015 @11:52PM (#10243222)
As I understand it, the new policy at HN is to allow duplicate posts to make sure enough readers see the article. I used to check for duplicates before posting, but now I don't bother.